Implicit Large-Eddy Simulation of a Deep Cavity Using High-Resolution Methods
Implicit Large-Eddy Simulation of a Deep Cavity Using High-Resolution Methods
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DOI：
10.2514/1.36856
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发表时间：
2008-10
期刊：
影响因子：
2.5
通讯作者：
B. Thornber;D. Drikakis
中科院分区：
文献类型：
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作者：
B. Thornber;D. Drikakis
采用最近发展起来的隐式大涡模拟(ILES)方法，对马赫数为0.8、雷诺数为860,000的深腔进行了隐式大涡模拟。所采用的数值方法是一种新的空间五阶精度方法，其中对变量外推进行了修改，使其在流动的低马赫数区域(如湍流区域)的性能得到了极大的改善，同时保留了原方法的激波捕获能力和平流物种的正性。将ILES结果与Forestier等人的实验测量结果进行了比较。(《流体力学》，第475卷，2003)，平均流场、雷诺应力和压力谱。在所有网格水平上，基模的频率和幅度都被预测在2%-6db以内。平均流场和雷诺应力的一致性很好，说明在这种流动形态下使用新的重构方法时，不需要显式的亚网格模型。
Implicit Large Eddy Simulations of a deep cavity at Mach 0.8 and Reynolds based on cavity length of 860,000 have been conducted using a recently developed Implicit Large Eddy Simulation (ILES) method. The numerical method employed is a new fifth-order accurate in space method where the variable extrapolation has been modified to give greatly improved performance in low Mach regions of the flow, such as areas of turbulent flow, yet retaining the shock capturing capabilities of the original method, and positivity of advected species. The ILES results are compared to experimental measurements by Forestier et al. (J. Fluid Mech.,vol. 475, 2003) of the mean flow field, Reynolds stresses and pressure spectra. The frequency and amplitude of the fundamental modes are predicted to within 2% and 6dB at all grid levels. There is excellent agreement of the mean flow field and Reynolds stresses, demonstrating that there is no need for an explicit subgrid model when using the new reconstruction method for this flow configuration.